Quoted from winteriscoming:Ok, so a little more experimentation has lead me to the conclusion that the recorded sound effects are stored on the sound roms as unsigned 8-bit data, and that the first pair of roms have two channels of the same sounds and the 2nd pair has two channels of the same sounds.
The sound rom can be imported into Audacity and played back.
This includes all gunshots, explosions and crickets. That means if you replace the sound with another that is less than or equal in length, it should be possible to change them.
My assumption is that the music is not a recorded sound, but likely the result of some kind of on-board synthesizer. I'm not sure where that data is stored, but the beginning of the first pair of rom files is not recorded sound data.
Do you have any tips on how to extract the sounds? I tried it on a Strange Science rom and it somewhat works! If I play the rom at full speed it lasts about 1 second. I could pick out one section that if I slow down to 0.21x speed it says "Strange Science" just like in the game! Some of the other sounds must be embedded at slower speeds because there is still a lot of fast sounding sounds when playing back the whole thing at 0.21x
